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No. 622,095. P t t a m 29, I899.

c. B. WINCHELL. a e M SAW CLAMP AND FILING GUIDE.

(Application filed Mar. 29, 1897. Renewed Jan. 10, 1899.)

(No Model.) 3 Sheets-Sheet I.

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No. 622,095. Patented Mar. 28, I899. f1:

0. B. WINGHELL. SAW CLAMP AND FILING GUIDE.

(Application filed Mar. 29, 1897. Renewed Jan. 10, 1899.) (No Model.) 3 Sheets$heet 2.

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N9. 622,095. Patented Mar. 28, I899. C. B. WINCHELL.

SAW CLAMP AND FILING GUIDE. (Application filed Mar. 29, 1897. Renewed Jan. 10, 1899.) (No Model.) I

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PATENT FFlCE.

CHARLES B. VVINOHELL, OF NEW YORK, N. Y.

SAW-CLAMP AND FILING-GUIDE.

SPECIFICATION forming part of Letters Patent No. 622,095, dated March 28, 1899. Application filed March 29, 1897. Renewed L Tanu'ar'y 10, 1899. Serial No. 701N767. (No model.)

a guide is provided upon which the file is caused to slide in filing the saw-tooth. In the present improvement I provide a supplemental file-guide connected to and moving with the file-guide, so that they are simultaneously adjusted and held in position, and the parts are constructed in such a manner that great facility is given in the manipulation of the file, because there are no projecting parts against which the hand or arm of the saw-filer is liable to strike.

In the drawings, Figure 1 is an elevation of the clamp and portion of a saw. Fig. 2 is an elevation at right angles to Fig. 1. Fig. 3 shows the clamp inverted for bringing the supplemental file-guide into position for use. Fig. 4 is a section at the lineozoc, Fig. 1,without the saw and with the clamp at an inclination. Fig. 5 is a section near the line y y, Fig. 2. Fig. 6 is a plan view with the parts in the positions shown in Figs. 1 and 2. Fig. 7 is a section at the line a c, Fig. 2; and Fig. 8 shows the file-block with the file in section.

The back jaw A and front jaw B are connected together by the pivot 5, and there is a spring C between the jaws tending to open them, and a clamp-bolt D passes through the jaws and is provided at the back end with a nut 6, and the front end is formed as an eye for the pivot of the double cam-lever E, the cam-shaft ends of which correspond in shape at each side, so that either cam can be availed of in pressing the moving jaw upon the saw, whether the handle of the cam-lever stands in the position shown in Fig. 1 or whether it may be thrown over into the position shown in Fig. 3, which is a convenience when the apparatus is inverted to bring the supplemental file-guide into position for use, because in that position the handle of the camlever will stand downward instead of projecting upward, as in the aforesaid patent, and it is advantageous to provide a stop at 7 for limiting the movement of the cam-lever E as the jaws are closed upon the saw.

There are wooden jaw-faces 8 and 9 for the inner sides of the respective jaws, and the back jaw A is extended out and terminates as a supporting-disk A, through which passes a bolt F for fastening the saw-clamp to a vertical standard Q. At the back of this standard a slotted radius-bar Gr is provided, the bolt F passing through the same and terminating with a nut 10 by which the parts can upon it the circular saw J, and the bolt and nut R connect the slotted arm H and the radius-bar G, and it is to be understood that by the radius-bar G and the slotted arm the saw-stud can be placed and held in any desired position for supporting the saw and allowing it to be turned around progressively as one tooth after another is filed.

The file-guide K is in the form of a table connected to the back of the jawAby pivots or hinges 11, and the supplemental file-guide L is also connected atthe back of the jaw A by the hinges or pivots 12, and there is a bracket M extending out behind the back jaw A and beneath the file-guide K, and through a mortise at the end of this bracket an arc bar N passes, such are bar N being pivoted at 14 to the under side of the file-guide K, and

there is a clamp-screw 13 for holding the arc bar, and such are bar is preferably notched and provided with divisions and numbers, so that the parts can be set and held with the file-guides perpendicular to the jaws or at any desired angle either in one direction .or in the other direction.

There is a finger or bracket 0 extending at the back of the file-guide K and notched at one side to engage a bar P, which passes across diagonally at the back of the supplemental file-guide L, and the parts are so positioned that the supplemental guide and fileguide can swing together upon their pivots, and they will remain parallel, or nearly so, to each other, and in consequence of the pivots of the one file-guide being at an angle to the pivots of the other file-guide the diagonal position of the barPallows the movement necessary as the file-guides swing into the desired angle either in one direction or the other.

It will be observed that the edges 15 of the jaws A and B are in line with the surface of the file-guide K and the edges 16 are in line with the supplemental file-guide L, and hence when the surfaces of the teeth to be filed are in line with the edges 15 the file is to be used in connection with the guide K, and when the teeth to be filed are in line with the edges 16 the supplemental guide L is to be used with the file. In either instance instead of allowing the file to be moved closely adjacent or in contact with the surface of the fileguide, as in the aforesaid patent, I place a guide-block S upon the end of the file, so that this guide-block can rub upon the surface of the file-guide as the file is used upon the tooth, and it is to be understood that in properly placing the saw-stud I to hold the saw the surface of the tooth to be filed should be above the edges 15 or 16 a distance corresponding to the distance that the guide-block S raises the surface ofthe file above the fileguide, so that in filing the tooth the file will be carried along straightand parallel with .the surface of the file-guide.

The figures and letters upon the drawings represent the positions in which the respective parts are to be placed when filing the faces of the teeth or when filing the backs of the teeth, the edges 16 being used in filing the backs of the teeth, as seen in Fig. 3, with the jaws or vise inverted, and the faces of the teeth are filed when the parts are in the position shown in Figs. 1 and 2, the file being manipulated adjacent to the edges 15.

It is often desirable to file the saw-teeth at an inclination or bevel, and by placing the file-guides at the proper inclination upward or downward to the jaws the file can be used with uniformity in sharpening the teeth, and it is to be understood that the saw is to be turned from time to time to bring the teeth around in succession into the positions required for filing such teeth upon the faces of the teeth, and then the position of the supporting-stud for the saw is to be changed and usually the saw-vise inverted, so as to file the backs of the teeth in succession.

Vhen the file-guides are at an inclination, it is not convenient to manipulate a file and move it along parallel to the surface of the file-guide, it being always much more convenient to move the file along horizontally. To provide for bringing the file-guide substantially level, I loosen the bolt F sufficiently to introduce between the vertical standard Q and the supporting-disk A of the back jaw A a wedge-shaped filling-piece T, slotted for passing such bolt F, and then the bolt F is tightened to clamp the parts together, and by this filling-piece the holding-jaws are inclined so as to bring the file-guides level, or nearly so, and this wedge-shaped filling-piece T, being easily removed, can be substituted by another wedge-shaped filling-piece of a different angle, if desired, and it is to be under-- stood that the hole in the standard Q or in the supporting-disk A is to be sufficiently large to allow the parts to turn into the angular position corresponding to the wedge shape of the filling-piece.

The moving jaw is recessed in its front surface for the reception of a removable block 20, to which is attached a piece of flexible material, such as leather, to hang down over the cam of the lever, so as to prevent the filings dropping upon the cam. This block can be removed from the recess so as to be out of the way when the clamp is inverted, as shown in Fig. 3, and the lever swung toward the jaw portion of the clamp.

When this clamp and filing-guide are used upon a circular saw that is allowed to remain upon its arbor in the bench or bearings, the said clamp can be bolted to orotherwise supported upon the bed or carriage and the saw and arbor be turned progressively as the teeth are filed.

The file-block S may have one side parallel to one flat side of the file and another side at an angle to the surface of the file, as shown in Fig. 8, so that the file may be used with one of these sides of the blocks upon the fileguide while filing the front of the tooth, and then the other side of said block will be on the file-guide while filing the back of the tooth.

I claim as my invention' 1. The combination with the clamp-jaws for holding the saw, of a file-guide, hinges for connecting such file-guide to the back jaw, a second file-guide and hinges for connecting the same to the back jaw, means for connecting the two file-guides so that they can be swung on their hinges and will remain substantially parallel to each other, an arc bar pivoted to one of the file-guides and a bracket and clamp for holding the same and retaining both the file-guides in the position to which they may have been adjusted, substantially as set forth. I

2. The combination with the clamping-jaws having two sets of edges at which the saw is filed, of a file-guide in line with one set of edges and a supplemental file-guide in line with the second set of edges, pivots for connecting the file-guides to the jaw, a connection between the two file-guides, and means for holding such file-guides at the desired angle to the saw, substantially as set forth.

3. The combination with the saw-clamp,of a file-guide and a supplemental file-guide, pivotal connections for the same to the back jaw of the clamp, means for holding the guides at the desired angle to the saw-clamps, a finger upon one file-guide and a bar upon the other file-guide engaging the finger for causing the file-guides to move together as ghey may be adjusted, substantially as set orth.

4. The combination with the saw-clamp, of a file-guide and a supplemental file-guide, pivotal connections for the same to the back jaw of the clamp, means for holding the guides at the desired angle to the saw-clamp, and a sliding connection between the file-guides for holding them substantially parallel to each other, substantially as set forth.

5. The combination with-the saw-clamp and a file-guide, of a standard, a bolt for connecting the clamp to the standard and a ren10v-. able wedge-shaped filling-piece adapted to be inserted between the standard and the fixed jaw for inclining the clamp and bringing the file-guide substantially level, substantially as I 5 set forth.

6. The combination with the saw-clamp and table forming a flat file-guide, of a guideblock having an opening to receive the end of the file and with two guide sides forming 20 an acute angle and allowing the file to be used either on the cutting edge or the back of the tooth, substantially as set forth.

Signed by me this 16th day of March, .1897.

O. B. WINOHELL.

Witnesses:

GEO. T. PINoKNEY, S. T. HAVILANn. 

